US Patent Application by John Francis Crane
(March 26, 1973); this patent application is useful for historical purposes, as it
contains a partial history of Rife devices and a health-problem/frequency-list.

British Patent 8,575Improved Methods of
and Apparatus for Generating and Utilizing Electric Energy for Lighting Purposes

British Patent 11,293Improvements
relating to the Utilization of Electromagnetic, Light, or other like Radiations Effects or
Disturbances transmitted through the Natural Media and to Apparatus therefor